Hemstitch sewing-machine.



No. 833,277. 1 PATENTED OCT. I6, 1906.

C. M. ABERCROMBIE.

HEMSTITCH SEWING MACHINE. APPLICATION FILED APR. 2e. 1905.

" 4 SHEETS-[MEET 1.

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. WnNEssEs.- JNVENTOR.

A TTORNE Y PATENTED OCT. 16, 1906.

4 SHEETS-SHEET 2.

INVENTOR.

' ATTORNEY C. M. ABERCROMBIE. HEMSTITCH SEWING MACHINE.

APPLICATION FILED APR.26. 1905.

WITNESSES PATENTED 00116, 1906."

4 SHEETS-SHEET 3 N I Q N llllllil ATTORNEY II. m UIN, @mi x Y Ilmlmmml 1 I I Il M1.

` IN VEN TOR 551i llllllflnll 505i! C. M. ABERCROMBIE. HEMSTITCH SEWING MACHINE. APPLIOATION FILED APR ze 1905 WITNESSES.'

PATENTED OG'I. 16, 1906.

G. M. ABERCROMBIE. HEMSTITGH SEWING MACHINE.

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ATTORNEY UNITED STATES' PATENT OFFICE.

CHARLES MACKENZIE ABERCROMBIE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO W HEELER & WILSON MANUFACTURING COMPANY', OF

BRIDGEPORT, CONNECTICUT,

A CORPORATION OE CONNECTICUT.

Specification of Letters Patent. l

Patented oct. '16, 1906.

Application filed April 26, 1905. Serial N0. 257,452.

T all whom it may concern.'

Be it known that I, CHARLES MACKENZIE- ABERCROMBIE, a citizen of the United States, residing at Bridge ort, in the county of Fairfield and State of onnecticut, have invented a certain new and useful Improvement in Hemstitch Sewing-Machines, of which the following is a full, clear, and exact description. i E E This invention relates to hemstitch sewingmachines; and its object is to provide a simple and practical mechanism for locating the several lock-stitches forming the hemstitch figure is liable to be figure by giving to the needle-carrier, in addition toits vertical movements, lateral movements in directions transverse to'each other.

In the common construction of hemstitch sewing-machines it has been the general practice to give to the needle-carrier the usual vertical movements for the formation of the lock-stitch andv lateral movements transverse to the line of feed of the material for placing the individual lock-stitches on and off the hem-fold, coupled with means for feed- "f ing the material two stitches forward and one backward. This feeding mechanism is complicated, heavy of operation, and hard to control in its limit of feed movements and involves a nicety in construction and also an adjustment of parts hard .to maintain and without which the open-work of` a hemstitch imperfect, owing to the threads yof the material not being properly drawn into the'stitch. l

In the present construction a four-motion feed is employed to advance the material two feed movements for the formation of each hemstitch figure, and the needle-carrier is mounted in an oscillatory frame pivoted to the overhanging arm and controlled to effect lateral movements ofthe needle transverse to andin line with the feed.-

In the accompanying drawings, illustrating the invention, in the several figures of which like partsare similarly designated, Figure 1 isla front elevation with a portion of the bedplate and overhanging arm in section. Fig. 2 is an end elevation, partlyr in section. Fig. 3 is a front elevation, 'partly broken away to better illustrate the mechanism for transmitting motion to the loop-taker. Fig. 4 is a transverse section through the overhanging arm, taken substantially on the line B, Fig.

1, illustrating the cam action for controlling the lateral movements of the needle in line with the hemstitch seam. Fig. 5 is a transverse section of the bed-plate and lowerimain shaft, illustrating the action of the feed-lift cam and its connections for giving vertical movements to the feed-dog.l Fig. 6 is a front elevation of the universal joint employed to permit transverse laterall movements of the needle-carrier. work, showing the position of the needle punctures for the formation of a hemstitch seam, together with the position thread before it is drawn to action of the take-up, the material of the hem-fold being shown as of coarse weave. Fig. 8 is a diagram of the work as `it appears after the stitches of the hem-fold have been drawn to form the openwork in the hernstitch. Fig. 9 is ad'evelopment of the cam-groove for lateral movements of the needle-carrier in the direction of the line of the seam.

1 is the bed-plate of the sewing-machine; 2, the overhanging arm; 3, the band-wheel; 4, the needle-actuating shaft; 5, the uarte'- ing-crank connections for operative y conposition, by the necting the needle-actuating shaft 4 with they lower main shaft 6.

7 is the loop-taker, 8 the (Shown in dotted lines, Fi

9 is the bracket secured bed-plate-l and in 8 is journaled.

s. 2 and 3.) l

I screws 10 to the to form the open-work,

which the loop-taker shaft Fig. 7 is a diagram-of the of thel needlecontrolling the loop-taker shaft. i.

1 1 is a counter-shaft provided with a bevell l gear 12, and 13 is a bevel-'gear fast on shaft 8, and through these gears motion is transmitted to the loop-taker. Y

14 is a gear secured on shaft 11 and meshing with a gear 15, secured yon shaft, such gears being of the proportion of two to one, thusgiving to the loop-taker two revolutions to one complete actuation ofthe needle for the formation of the lock-stitch.`

16 and 17 are collars secured by screws 18 and 19, respectively, toshafts 6 and 11, respectively, to prevent end thrust of said shafts.

20, 21, and 22 are suitable screws for securing the gears 12,714, and 15, respectively, to the shafts 6 and 11, respectively. To the forward end of the needle-actuating shaft 4 is suitably secured a take-iup' cam 23, to

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1 5 take-up which latter is fulcrumed, by a suitable stud 24 (shown in dotted lines, Fig. 1) and nut 25, a link 26, the opposite end of which. is connected to the needle-carrying bar 27 by a suitable connection, as 28. yIn suitable bearings 29 and 30 is mounted the usual presserbar 31, provided between its bearings with the usual presser-spring 32, resser-bar-lifting collar 33, and tension-re easing bracket 1o 34, its lower end. 35 provided with a clothlpresser 36, such as is common to the Wheeler & Wilson hemstitch sewing-machine.

37 is a presser-lifter lever secured t0 the overhan ing arm by a screw 38, and 39 is a ever mounted and operated inthe usual manner. Suitably mounted on the face-plate 40 is a thread-leader 41, threadcheck 42, and tension mechanism 43.

44 is the feed-controlling lever operatively 2c connected, by a suitable connection, as 45, to

an adjustable lever 46, the end 47 of which is journaled to a lever made integral with the rock-shaft 48, the opposite end of said lever 46 being provided with a suitable -slide-block z 5 49, adjustable on the lever 50, which lever in turn is` secured to a shaft 51, mounted in a suitable bearing 52, (see Fig. 1,) formed integral with the bed-plateof the sewing-ma- 'I chine, said shaft 51 being provided at its opgo posite end with a lever 53, stud 54, and roller 55, which roller lco erates with a camgroove 56, 'formed in t e cam 57, which cam is provided at its periphery with gear-teeth 58, which mesh with the teeth of a gear-wheel 3 5 59, secured to the lower shaft 6, (see Fig. 5,)

such gears beingin the proportion of three to one, thus effecting one rotation of the cam to three rotations of the shaft 6.

60 is a cam (see Figs. 1 and 4) mounted to 4 u 'rotate upon a bearing 61, (shown in dotted lines, Fig. 4,) made integral with a stud 62, which latter is secured 1n the overhanging arm by a nut 63 and provided with an opening 64, through which passes the needle-actulat1ng shaft 4. TheV cam 60 is held against three to one, the same as the proportion of the coacting gear-teeth formed on the cam 57 and gear 59, which latter cam and gear control the backward and forward movements of the feed-deg, While the former gear 67 and 6o cam 60 control the lateral movements of the needle.

70 is a rock-lever provided with a shaft 71, which latter is journalaed in a suitable bearing v 72, formed on the under side of the overhanging arm 2, said shaft being provided with a 'i eee-,277

hub 73 and collar 74 to hold it against length wise movement. lever is provided with a roller-stud 75 and roller 76, which latter travels in a camroove 77, formed in the face of the cam 60, t e opposite end of the rock-lever 70 being provided with a groove 78, into which is adjustably secured, by a suitable bolt 79 and nut 80, one end of an adjustable connection 81, the opposite end of said connection being secured, by a suitable stud-screw 82, to a needle-bar-carrying -frame 83, which frame is mounted to swing laterally in directions transverse to each other. In the outer end of the overhanging arm 2 is journaled a shaft 84, which shaft is held against lengthwise movement by a collar 85, provided with a set-screw 86, the opposite end of said shaft 84 constructed with oppositely-arranged bearings 87 87, in which is journaled a short rockshaft 88, provided with an opening 89, in whichis secured, byla screw 90, one end of a connecting-rod 91, the opposite end of said rod being secured by screws 92 in the upper end of the needle-bar-carrying frame 83. The rock-lever 7 0, connection 81, needle-barcarrying frame`83, and the connection comprisin parts 84 to 92, inclusive,comprise a ine of connections for operatively connecting the cam 60 with the needle-bar-carrying frame 83 for giving to the needle lateral movements transverse to the lengthwise feed of the material, the parts 84 to 92, inclusive, forming a universal-joint connection between the needle-bar-carrying frame 83 and overhanging arm 2 for permitting the needle to be moved laterally in transverse directions.

The mechanism for effecting the lateralv movements of the needle in opposite directions in line with the feed of the material comprises suitablev bearings 93, formed in the under side of the overhanging arm, in which is mounted a shaft 94, to the forward end of which is secured a lever 95, which lever at its free end is provided with a slot 96,' into which projects a lug 97, formed int'egral with the frame 83, and to the opposite end of said shaft 94 is secured, by a screw 98, a rock-lever 99,

the free end of which is provided With a rollerstud 100 and roller 101, which latter tracks in a groove 102, formed inthe periphery of the cam 60, which cam-groove, in connection with a spring to be hereinafter described, effects a rocking motion of the lever 99, shaft 94, and lever 95, and consequently effects (through the connection comprising the groove 96 and lug 97) lateral movements of the frame 83 in opposite directions in line with the feed of the material.

The lever 99 is provided with an arm 103, which extends backward (see Fig. 4) in a direction transverse to the axisof the shaft 94, and said arm 103 has an adjusting-screw 104, which in the operation of the machine abuts against a step 105, formed on the overhanging The free end of the rock- IIC Y screw 104 in contact with the step 105, so that f 102. The Wall the roller 101 is tance from the Wall 108 of the cam-groove 109 of the cam-groove does not iniuence the travel of the roller 101,

-1 varied in accordance owing to the spring 107 holding the roller 101 in the direction of the wall 108 to the desired adustment-of thel adjusting-screw104. By

-these means thethrow of the lever 99 may be With the character of work to be done. i Y

' 11`0 is a feed-dog (see Fig. .5) secured by screws 111 to-a feedbar 112, which feed-bar is'fulcrumed, by a stud 113fan`d nut 114, to a llever. v115, which is` secured byscr'ew 116 'to the forward end" of mounted in any usual way underneath th'ev bed-plate 1of the sewing-machine, thus connecting the feed-dog 110,'through the adjustable lever 46, Fig. 2, lever 50, shaft 51,1ever bar 112, thus 'effecting through 5'5'I The operation `of the-,device isas follows:

`ve r 131, the` free block 132,heldin position by a stud, 133. and nut,1'34, said block working in a' slot 135,

l56, which latter controls the backward and forward movements of the feed-dog. i

117 is a set-screw for-securing the gear 59 53, stud 54 and roller 55, with the cam-groove The c'am 57 is mounted upona shaft 118,1

Journaled in a bearin formedin the bracket` 119, Figs. 1 and 5, wir the under side of the Y 120. To ,effect vertical' "ch latterissecured to ements of the suitable screw,

Il feed-dog 110, issecured by a as 121, upon the end of the shaft'118La feedf lift cam.122', formed With`cam portions 123, `which coact with the roller 124, mounted upon a roller-stud 125, secured in a lever 126, fast on therock-shaft 127 ,which rock-shaft is held between pintles 128, threaded into lugs '129, formed integral with the bed-plate 1 of vthe sewing-machine,

against accidental adjustment by screws 130.

such pintles being held the rock-shaft 127' is aleend of which carries a slide` Formed integral with formed -in the end of the feed-dog-.carrying the action of the cam 122 verticalmovements of the feedd og 110. y

v Supposingthe needle-bar to be at its hi hest stitch a, (see Fi lever 70 would throw ready to`desce'nd to form the ocke riding the concentric portion 136 of the 'cam 60 and the roller 101 of rthe rock-lever 99 would be held by spring 107 .in contact With the Wall 137 of thethe roller 55, carried by the stud 54, occupyheld'at a greater orlessdisf the feed rock-shaft 48,v

bed-p atefl by screwsA 7,) the roller-76 of the rock-- groove 102, thus throug ,causing the Afeed-dog 1 1 0 to the operator in position to be later moved uptaker and at the sam'e time force an opening in the position 1138 in the cam-groove l56, the vl ro ler 124, operatively connected with the rock-shaft 1'27, riding one of the-cam portions 123 and being 122 by the pressureofthe presser-foot 36,

through the action of spring 32, acting upon heldin contact with the cam the upper surface ofthe feed-dog 110, which if connectiony 131 and shaft 127'holds the lever 126 so as to effect the cooperation of the roller 124 and cam 122; As the needle descends through the cloth in the formation of the vstitch a the roller 76 of the rock-lever travels from the position 136 of the camgroove 77 to 'the concentric portion 140'of said camroove, giving to the needle-carryvlng bar als ight lateral movement to the right,

the roller 101 continuing to ride the wall 137 of the cam-groove 102 in the periphery of the traveling from the position 138 of the'camgroove 56 to the position 141 of the camgroove 5 6,the rollerr124 passing from one of the cam portions 123 to one of the concentric portions '(142 of fthe cam 122, thus through the action ofthe roller 124 lpassing from the cam portion 123 to the cam 60, the roller 55, carried by the 4lever 53, f

142, allowing the feed-dog to be moved f downward by the action of spring 32, encircling the presser-bar 31, and the travel of the roller 55 from the position 138 to 141,through the connections 46,l 50, rock-shaft 51, feed rock-shaft 48', andfeeddog-carryingbar 1 12, 'be moved toward ward4 andlforward to advance the material.

1As' the needle risesy in the formation of stitch a'the` roller 76, vtravels from the i 143 in the cam-groove 77 thusmovi'ng the needle laterally for the formation of stitchv b, and roller 55,

carried by the rock-lever 70. position 140 to the position to the leftl readyto descend from position 141 to the position14'4, causing the feed-dog 1 10, thropgh connections 46, 50, 51, 48, and fee moved forward, -thus effecting' a feed move- 'ICO -dog-carrying bar\112, to be IlO ment of the material from a' to b, the roller i,

124 having passed during this time from one of-` the concentric portions 142 to one vof the cam portions 123, Ithus forcing the feed-dog a 110 upward intocontact with the materi while-the roller 55 in its travel from. position 141 to'144 causes the feed-dog to be moved i to effect a feed movement of the material, the

roller 101, carried bythe rock-lever 99, trav-A l eling from wall 137 to wall 145 in 'the cammovement in line with the seam and In the descent -of the tera] toward the operator.

needle to form the stitch b the roller 76', lcarried by. the rock-lever 70,4 tracks the camgroove7 7 to therposition 146 and in doing so causes the needle to be movedlaterally to the ri ht while in the material, so as to ro erly present the loop of needle-thread to 51e lbopl givingfto the needle a slight 4 90I concentric portion in the material which, in connection with the succeeding stitch, forms the open-work of the hemstitch seam. Durin the downward stroke of the needle in the ormatio of stitch 5 bthe roller 101 continues to ride the wall 145 of the cam-groove 102, the roller 55 traversing the groove 56 of the cam 57 from the position 144 to the position 147, which portion of the cam-groove is concentric with the aXis of the cam, and consequently leaves the feeddog in its advanced position; but during this time' the roller 124 travels from one of the high portions 123 of the cam 122 to the concentric portion 142, thus permitting the feeddog 110 to drop to its lowest position ready for its return movement. During the upward stroke of the needle-bar incident to the formation l,of stitch b the roller 76, carried by the rock-lever 70, travels from theposition 146 to the position 148, causing a slight lat-- eral movement of the needle-bar to the left, the roller 101 having passed the wall .145 of the cam-groove 102 and being hel'd a slight distance from the wall 108 by the point'of the adjusting-screw 104 being brought in contact, through sprin 107 with step 105, thus giving to the needleara slight lateral movement in line with the seam and in the direction of the feed, the roller 55 during this time having traveled from position 147 in the cam-groove 56 to the position 149, and in doing so moved through connections 46,'50, 51, 48, and 112, the feed-dog 110' back toward the operator or in position to be again moved to advance the 'material under the, needle, the roller 124 continuing to ride one ofthe concentric portions 142 of the cam 122. In the descent of the needle to form stitch c' the roller 76 travels from theposition 146 to the position 150, completing the lateral movement of the needle-bar to the left, so as to bring it in line with stitch c before the point of the needle ent'ers fthe material, and while the -needle is completing its downwardstroke the action ofy the camoove 77 on roller 76 of rock-lever 70 moves ,the'needle to the right, thereby forming an lopening in the material and at the same time presenting the needle-thread loop to the action of the loop-taker, the roller 101 continuing its travel in the groove 102 opposite-the ,i wall 108, the roller traveling from the pol sition 149 of the cam-groove 56 to the position 151 and the rollerI 124 continuing to travel one ofthe concentric iportions 142 of the cam 122. As theneedle-bar rises outof the material in the formation of stitch c the roller 76 travels from'the position 150 in the Y cam-groove 77 to theposition 136, or to the position commencing the hemstitch figure, the roller 101 traversing the groove -102 from a position adjacent to the\wallf108 to the wall 137'and in doing so giving to the needle a slight lateral movement in line with the seam and in a direction opposite to the feedof thematerial, the

vthat while the needle is in .material lying tr and the stitches which the needle-bar occupied when roller 55 tracking the cam-groove 56 of the cam 57 from the position 151 to138, effecting, through the connections 46 50 51 48 112 and the feed-dog 110, the second feed movement of the material, and the roller 124 traveling from one of the concentric portions 142 of the cam 122 to one of-the cam portions 123, thus completing the hemstitch figure by the employment of a one-way feed of the material in combination with a needle-carrier having lateral movements Yin directions transverse to each other.

From the foregoing it will be understood the goods for the formation of each of the stitches b and c the needle is given a lateral movement to the right,`so as to displace the threadsof the material parallel with fold d, andwhenithe needle rises from the stitch c and the take-up is actuated in connection with the formation of stitch e, the threads of the material having been previously displaced toward the hem fold, the pull of the take-u causes. the threads of the nsverse to the -line of feed the seam toward the hem,

b and c to be drawn to thev j position e, Fig. 8, thus forming the open work of the seam, as illustrated byff It is not esssential that the latera movements of the needle and the feed of the material shall occur during the exact Jtime herein pointed out relative to the vertical movements of the needle,` for such lateral movements of the needle as occur when the needle is out of the material may take lace atan time while the needle kis above t e materia and the same is Vtrue ofthe feed movements;

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but it is desirable to time the machine so that the lateral movements of the needle'and'the feed movements of the material occur at substantially the time previously'pointed out. Further, it will be understood thatthe two forward feed movements occur, first, between stitches a and b and, second, between stitches c and a and that while 'of the material between stitches a and b thereis a lateral movement of the needle-bar to the left to bring the needle in line with stitches c and b and a slight lateral movement of the needle-bar toward the operator, and after the needle has entered the material the needle is moved to the right to present the thread-loop to the point of the loop-taker, and between stitches b and c there is a lateral movement ofthe needle parallel with and in the direction of the feed of the material and also slightly to the left to `position the needle for the formation of stitch c, ,and after the needle has entered the material in the formation of stitch c the needle is given a lateral movement -to the right, as in the formation of stitch b, to present the thread-loop .to the action of the loop-taker. ,Between stitches c and a the needle is given a ment to the right to bring it in line with the needle is out' lateral move- A I lo! and feed, and the second would be represented by a/ a3, the 'stitch c2 stitch a and at the same time a very slight lateral movement toward .the operator. This completes the first hemstitch figure, and the `several succeeding hemstitch figures are made by similar movements of the needle hemstitch figure b c" a2 in the order mentioned, the stitch. c being made alongside ofthe stitch b. The'third hem- Astitch figure would be represented by a2 b? c2 being made alongside of the stitch b', and the fourth yhemstitch figure would be represented by a3 b3 c3, the stitch c3 being made alongside of the stitch b2 and then the other stitch to the right.

-It is to be observed that the control of the Alateral movements of the needle in transverse directions is entirely independent of the control of the movements of the feed-do for advancing the material' to the action o the needle, and'therefore if such needle actuation were used in connection with a .four-motion feed Iactuated to advance the material for each successive lock-stitch, as is common to 'the ordinary sewing-machine, supposing the first stitch to be made at c, the second and third stitches would be interlocked at b, as the needle would be moved backward at the l same time that the material was fed backfifth and sixth stitches at'b2, and so on, formdle controlled tomove 't directions.

' that `these may be varied'within a wide ran e l while employing ward, thus effecting two stitches at b. The fourth stitch would be located at a2 and the ing a seam-of two interlocking stitches off the hem .fold and onesingle stitch on the hem fold. Hence it is evident that the invention `is`capablefof additionaliapplications 'of a neelaterally in transverse 4 Theinvention is not limited to the details hereinbefore t described, since it is evident substantially the same prin- `ciple, and this well to .embodiment of the principle of the invention in 'othersewing-machines than those designed specially for hemstitching.

l What I claim is* 1. -In a sewing-machine, cloth-feeding mechanism-and 5o the' latter including a needle-bar-carrving frame jointed to its sup ort and ca 'able of oscillation inthe line o the clotheed and Stitches. i, y

2. Ina sewing-machine, the combination of a stitch-forming mechanism including a needle-carrier, a cloth-feeding -mechanism, vand meansto control these mechanisms to give tothe needle lateral movements in transverse directions to form stitches. s 3. In a sevving-machine, the combination of means for effecting a one-way feed of. the 4material7 with\ a needle-carrier and lmeans tocontrol it to -give to the needle lateral reservation applies equallyl stitch-forming mechanism,"

forming mechanism embodyinor connected with the needle-bar, a

movements in transverse directions to form stitches.

4. In a hemstitch sewing-machine, a stitchforming mechanism embodying a loop-taker, an eye-pointed needle, a needle-bar, a needlebar-carrying frame, a needle-actuating shaft, and connections between-A said shaft and frame for giving to said frame oscillatory movements in transverse directions, in combination With a cloth-feeding mechanism and means to control it to eHect two feed movements of the material for each hemstitch fig'- ure.

5. In a hemstitchseWing-machine, an overhanging arm, a needle, a reciprocating needle-bar, and a needle-bar-carrying frame, said frame pivoted to the overhanging arm and capable of oscillation in transverse directions, a needle-actuating shaft mounted in said arm, a cam, means to drive it from said shaft,

and connections between said cam and frame'l to effect the oscillatory movements of said frame 1n transverse directions, 1n combination with a feeding mechanism and means toV control it to effect two feed movements of the material for each hemstitch figure. 6. In a hemstitch sewing-machine, a stitcha loop-taker, an'eye-pointed needle, aneedle-bar, a needle-bar-carrying frame, a needle-actuating shaft, 'and connections between said shaft and frame for giving to said frame oscillatory movements in transverse directions, in combination with a feeding mechanism comprising a feed-dog, a-lift-cam, a feed-cam, and connections between the feed-cam and feeddog for controlling the movements of the feed-do to effect two feed movements of the materia for each hemstitch figure.

7. In a hemstitch sewing-machine, a stitchforming mechanism embodying a loop-taken.

a needle, a needle-bar, a needle-bar-carrying IOO frame, a needle-actuating shaft, and connecl' tions between saidshaft and frame for giving to said frame oscillatory movements in transverse directions, in combination with a main shaft, a feeding mechanism comprising a feed-dog, a lift-cam, a feed-cam, connections between said feed-dog and cams, a shaft upon which said cams are mounted adjacent to the main shaft, and gears of the proportion of three to one connecting said shafts, said lift- 'carn and feed-cam adapted to control the movements of the feedog for effectin two feed movements of the material for each emstitch figure.

8.l In a hemstitch sewing-machine,l having an rvoverhanging arm, a needle, a needle-bar and a needle-bar-carrying frame, said frame plvoted to the overhanging arm to oscillate 1n transverse directions, a needle-actuating shaft mounted in said arm and operatively cammounted adjacent to said shaft, gears operatively IIO IZG

connecting said shaft andl cam and bearing the proportion of three to one and provided with cam-grooves, and connections between the cam-grooves and frame to control the oscillatory movements of the said frame, in

-with the needle-bar, a cam mounted in said arm and geared to said shaft and provided' with cam-grooves, and connections between the grooves and frame for effecting control of the oscillatory movements of the needle-barcarrying frame, in combination with a feeding mechanism comprising a feed-dog, a liftcam and a feed-cam, said cams mounted upon a shaft adjacent to and operatively connected with the lower ymain shaft and formed to control, through suitable connections, the movements of the feed-dog for effecting two feed movements of the material for each hemstitch figure.

10. In a hemstitchsewmg-machine, having an overhanging arm, a needle ,a needle-bar and a needle-bar-carrying frame, said frame pivotedvto the overhanging arm and capable of oscillating in transverse directions, a needle-actuating shaft mounted in said arm and operatively connected with the needle-bar, a cam.

mounted adjacent to and operatively connected with said shaft by gears of the proportion "of three to one and provided with cam-grooves which, through suitable c onnections, controly the oscillatory movements of' the needle-bar-carrying frame, in combi-nation with a feeding mechanism comprising a feed-dog, a lift-cam and a feed-cam, said cams mounted upolr a shaft adjacent to and operatively connectedto the lower main shaft Aby gears of the proportion of three to one, 'the said lift-cam and feed-cam formed to control, through suitable connections, the movements of the feed-dog for effecting two feed movements ofthe material for each hemstitch figure.

11. In -a sewing machine, cloth feeding mechanism, and a stitch-forming mechanism including a loop-taker and a needle-bar-carrying frame, sai'd frame jointed to its supfport and capable of oscillation in the .line o the vfeed and also transversely to such feed, a

transverse movement taking place after the needle has entered the material'and'while it is presenting its thread-loop to the point of ver engaging .my hand this 24th the loop-taker in the formation of the stitch figure.

12. In a sewing-machine, an oscillating" eedle-bar-carrying frame jointed to its suport and capable of movement in transverse directions, a cam, a rock-lever actuated by said cam and connected to said frame to oscillate it transversely to -the feed of the material, and a rock-shaft operatively connected with said cam at one end and with theA frame at its other endcto oscillatesaid frame in the line of the'feed forforming the stitch figure.- 13. In a sewing-machine, the combination of a needle-actuating shaft, an overhanging arm in which it is mounted, a needle-bar-carrying frame, a jointed support for said frame arranged in the overhanging arm, and a cam arranged in the overhanging arm, and means to rotate itfrom the needle-actuating shaft, said cam having a face-groove anda peripheral groove, in combination with a rock-lever engaging the face-groove and connected with the needle-bar-carry-ing frame to oscillate said frame transversely tothe li-ne of feed of the material, and a rock-shaft connected with the peripheral groove at one end and having a lever fixed to its other end, said lever en aging the needle-bar-carrying frame to pscil ate it in the line .of feed of the materia A 14. In a sewing-machine, the combination of a needle-actuating shaft, an overhanging arm in which it is mounted, a needle-bar-carrying frame, a jointed support for said frame arranged in the overhanging arm, and a cam arranged inthe overhanging arm, and means to rotate it from the needle-actuating shaft, said cam having a face-groove anda peripheral groove, in combination with a rock-lethe face-groove and connected with the needle-bar-carrying frame -to oscillate said frame transversely to the line of feed of the material, anda rock-.shaft connected with the peripheralfgroove at one end and having' a lever fixed' to its other end, said lever engaging the needle-bar-carrying frame to oscillate it in the line of feed ofthe material, said rock-lever having an armand means to adjust its throw. 15. In asewing-machne, the combination of'means for effecting a one-way feed, means to control it to effect twofeed movements of the material for the formation of a threestitch figure, a needle-carrier, and means to control it to give to the needle lateral movei ments in transverse directions. y n Y In testimony whereofI have hereunto set day of April, A'. D. 1905.

IIO

YCHARLES `iiiciniirzm iracaum.

Witnesses:

E.L. ToLLEs, vAnim?. M. DQNIHEE.

`It is hereby certified that in Letters Patent No. 833,277, granted October 1G, 1906, upon the application of Charles Mackenzie Abercrombie, of Bridgeport, Connecticut, for an improvement in Hemstitch Sewingdachines, an error occurs in the printed specification requiring correcton,asfo]1ows: In lines 69 and 7l, page 1, the word of77 should read of; and that the said Letters Patent should he read with this correction therein that the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 30th day of October, A'. 1906.

[SEAL] F. I. ALLEN,

Commissioner of Patents. 

